1 Chronicles 23:24-27

24These were the descendants of Levi by their ancestral families  — the family heads, according to their registration by name in the headcount — twenty years old or more, who worked in the service of the Lord’s temple.

25For David said, “The Lord God of Israel has given rest to his people, and he has come to stay in Jerusalem forever.

26Also, the Levites no longer need to carry the tabernacle or any of the equipment for its service”  —

27for according to the last words of David, the Levites twenty years old or more were to be counted —